Hi,
I have yet not tried to integrate HANA with social media (APIs). First if you just want ti use SAP HANA and those APIs I guess a post in the SAP HANA Community would be a better choice for more valuable answers.
Basically if you want to use those web / http based APIs you should first of all get some knowledge in JavaScript and how JSON works (http://de.wikipedia.org/wiki/JavaScript_Object_Notation). Afterwards you should take a look at some examples provided by the social media provider API of your choice.
The skillset afterwards strongly depends on the scenario how you want to present the data you stored in HANA (e.g XS Engine / ODBC Connection / ABAP Server / ...).
Cheers
Jens